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当前位置:首页 > 品牌资讯 >Cayman检测试剂盒(Assay kits)---一氧化氮篇
硝酸盐/亚硝酸盐(Nitrate/Nitrite)检测试剂盒

一氧化氮(Nitric Oxide, NO)起着信使分子的作用。当内皮要向肌肉发出放松指令以促进血液流通时,它就会产生一些一氧化氮分子,这些分子很小,能很容易地穿过细胞膜。血管周围的平滑肌细胞接收信号后舒张,使血管扩张。由于NO在生物体内含量低,半衰期短,有O2存在条件下极易被氧化,这就给其准确测定带来困难。目前主要采用测定NO的稳定代谢终产物NO2-, NO3-间接反映NO含量的方法。由于样本中NO2-, NO3-的相对比例是变化的,因此测定NO的含量通常测定NO2-, NO3-的总和。Cayman开发的硝酸盐/亚硝酸盐(Nitrate/Nitrite)检测试剂盒可精确方便的检测硝酸盐/亚硝酸盐的总含量。
 产品名称
 编号
 规格
 Nitrate/Nitrite Colorimetric Assay Kit
 780001
 2 x 96 wells
 Nitrate/Nitrite Colorimetric Assay Kit(LDH method)
 760871
 96 wells
 Nitrate/Nitrite Fluorometric Assay Kit 
 780051
 2 x 96 wells


一氧化氮检测试剂盒(Cell-Based)                                                                                                                                              产品编号: 10009419

Cayman开发的基于细胞的荧光法一氧化氮检测试剂盒,可在活细胞中利用FA-OMe来检测NO。当非荧光的FA-OMe感应到活细胞中游离的NO时,可形成强荧光的脱氨产物dA-FA-OMe, 后者的荧光强度与细胞中产生的NO成正比。dA-FA-OMe的荧光也可以间接反映NOS的活性。试剂盒中,也提供NOS抑制剂L-NAME,可满足此实验目的。


图:LPS显著处理诱导NO水平升高。图A,B: RAW264.7细胞为Vehicle处理组;图C,D: RAW264.7经1ug/ml LPS处理;图E,F为RAW264.7细胞经1ug/ml LPS以及500uM L-NAME处理。左列A,C,E图细胞核经Hoechst Dye染色,右列B,D,F显示dA-FA-OMe荧光,指示NO产生。


一氧化氮合酶(NOS)活性检测试剂盒                                                                                                                      产品编号: 781001

NO由一氧化氮合酶(NOS)催化L-精氨酸与氧分子经多步氧化还原反应生成。不同类型的细胞中存在不同类型的NOS,通过不同的信号转导机制产生NO。NOS是NO合成过程中的关键酶,由于NO半衰期短,因此许多关于NO的研究都集中在NOS的研究上。现已知NOS有3种类型,可以广义的将其分为两种,即构成型一氧化氮合酶(cNOS)和细胞因子诱导型(iNOS或NOS2)。Cayman研发的的一氧化氮合酶分析试剂盒通过检测放射性精氨酸转换成瓜氨酸来确定NOS酶活性,该试剂盒可以满足50次实验要求。试剂盒中不包含放射性标记的精氨酸和NADPH。



图. 一氧化氮合酶催化L-精氨酸产生一氧化氮和L-瓜氨酸。L-羟基精氨酸为中间体,与酶紧密结合。


S-巯基亚硝基化(S-Nitrosylated)蛋白检测试剂盒                                                                                                                 产品编号: 10006518

Cayman开发的S-巯基亚硝基化(S-Nitrosylated)蛋白检测试剂盒是采用生物素转换(Biotin-Switch)的方法直接检测细胞或者组织样本中的硫巯化蛋白,也可通过WB方法分析。通过这种方法,游离的巯基基团首先被阻断,样本中的S-NO键被切割。新形成的SH基团被生物素化,然后偶联亲和素反应,可以通过比色法或者荧光法来检测样本中巯基亚硝基化蛋白的含量。
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